Read the following passage and answer the questions that follow. Refer to the text to check your answers when appropriate
The United States has a lengthy history of going to
war. It is a nation born from war. Pick any year since
1776, and the odds of America being involved in at
least one war is over 90%. Every US President has
faced war. Still, it may surprise you to hear that the US
government is at war with a fish.
Asian carp were introduced to American waters during
the 1970s. Southern fish farmers began importing them
to help clean their ponds. Asian carp are phenomenal
cleaners. Unfortunately, it didn't take too long for them
to escape from these ponds, perhaps from flooding, and
get into the Mississippi River. From there they have
followed their natural tendency to swim upstream. This
tendency may lead them into the Great Lakes and
Canada, a nightmare scenario for fisherman.
Asian carp are large fish. One species, the silver carp,
can grow to be 100 pounds. But despite their size, they
feed from the bottom of the food chain. That means
that they eat plankton and algae. A one hundred pound
fish can eat an awful lot of sea scum, and some of it is
toxic. The carp are resistant to the toxins, but we aren't.
Some Asian carp are hazardous to eat because they
have so many algal toxins in their systems. They also
have lots of tiny bones in their meat, which makes
them difficult to prepare. Asian carp is not a popular
delicacy.
Introducing the Asian carp into waters that have not
known them can be devastating. Beneath the surface of
the water is a unique ecosystem. This system rests
delicately on a balance that has evolved over millions
of years. Then along come these big, hungry bottom
feeders to mess up everything. They breed rapidly and
densely populate the waters. Worse still, they compete
with the native bottom feeders. The native bottom
feeders are smaller. Larger, tastier fish like salmon eat
them. The native bottom feeders are an important part
of the ecosystem. When the Asian carp outperform
them, the whole food chain suffers, all the way up to
the people.
Not only do Asian carp mess up the food chain, they
mess up people. Seriously. An Asian carp will bust you
in head. Remember that silver carp can be 100 pounds.
There is a reason why they are also known as "flying
carp." This particular species of Asian carp has a
tendency to jump when frightened. They can jump up
to ten feet in the air, and the sound of boat motors
frightens them. Watch out watersportists! In 2003 a
woman jetskier collided with one and broke her nose
and a vertebra. She almost drowned. In 2008 a teenager
broke his jaw on one while tubing. Many others have
been injured by these flying logs. Asian carp pose a
serious threat to water skiers and boaters.
In 2007 the U.S. Department of the Interior declared all
silver carp to be an injurious species. In 2010, the State
of Michigan passed the $30 million CARPACT. In
2012 Congress approved the "Stop Invasive Species"
act, legislation written solely to protect the Great Lakes
from Asian carp. The government has been on the
offensive against these large-bellied invaders.
But Asian carp are difficult to catch. Since they eat
from the bottom, they do not go for lures or baits like
most large fish. The best way to stop them is to keep
them out. The Great Lakes are connected to the
Mississippi River through the 28-mile Chicago
Sanitary and Ship Canal. For Chicagoans, it is the final
point of resistance.
A series of multimillion-dollar electrical barriers have
been built along the canal. The barriers are effective at
keeping adult carp at bay, but some fear that baby carp
may pass through. The United States Army Corps of
Engineers has been deployed along with EPA. In 2009
they poisoned the entire canal with rotenone, a
chemical that kills fish. The $3 million operation netted
over 90 tons of dead fish, and a single carp.
Some think that Great Lakes must be cut off from the
Mississippi River. The Michigan Attorney General
sued to have the canal closed. The Ontario government
and some Great Lake states have also taken legal
action. But the courts have been persuaded by the value
of the canal as a shipping conduit thus far. In the
meantime, the barriers continue to hold, but how long
can they? The carp have the Great Lakes under siege. Is
this a war that we are destined to lose?